afd2e8d0570b07bddbf2ce69a9ca3f1bdc53f885036eed8a6867bb6107aa70c3

Analysis

max time kernel
155s
max time network
221s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
04/12/2022, 12:16

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General

Target

afd2e8d0570b07bddbf2ce69a9ca3f1bdc53f885036eed8a6867bb6107aa70c3.exe
Size

480KB
MD5

1db5f2c2b826078e1c06c88d87b37897
SHA1

e969f8927d8865dc4e63ee5606e262aa54d88dd2
SHA256

afd2e8d0570b07bddbf2ce69a9ca3f1bdc53f885036eed8a6867bb6107aa70c3
SHA512

cbffba4fd768e4395131746928b84d68bdc98c5bb67af436c6f2bdb4fe86cf4cdd3c689b912dfdb9494e0f0365b3a9b04e5538f3b789ae5939dec0aa23b97ad0
SSDEEP

12288:g6PKnK6qcqbeGq4NQlq5AY5gAtK0P6+0Ehl:iBHKQlWVr

Score

10^/10

bootkit evasion persistence

Malware Config

Signatures

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = "C:\\Windows\\system32\\userinit.exe,C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\csrss.exe"	afd2e8d0570b07bddbf2ce69a9ca3f1bdc53f885036eed8a6867bb6107aa70c3.exe

Adds policy Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	afd2e8d0570b07bddbf2ce69a9ca3f1bdc53f885036eed8a6867bb6107aa70c3.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\csrss = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\csrss.exe"	afd2e8d0570b07bddbf2ce69a9ca3f1bdc53f885036eed8a6867bb6107aa70c3.exe
Key created	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	afd2e8d0570b07bddbf2ce69a9ca3f1bdc53f885036eed8a6867bb6107aa70c3.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\csrss = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\csrss.exe"	afd2e8d0570b07bddbf2ce69a9ca3f1bdc53f885036eed8a6867bb6107aa70c3.exe

Executes dropped EXE 3 IoCs

pid	Process
4184	csrss.exe
2976	csrss.exe
3880	csrss.exe

Modifies Windows Firewall 1 TTPs 1 IoCs

evasion

Modify Existing Service

T1031

pid	Process
4308	netsh.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Software\Microsoft\Windows\CurrentVersion\Run	afd2e8d0570b07bddbf2ce69a9ca3f1bdc53f885036eed8a6867bb6107aa70c3.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\csrss = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\csrss.exe"	afd2e8d0570b07bddbf2ce69a9ca3f1bdc53f885036eed8a6867bb6107aa70c3.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run	afd2e8d0570b07bddbf2ce69a9ca3f1bdc53f885036eed8a6867bb6107aa70c3.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\csrss = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\csrss.exe"	afd2e8d0570b07bddbf2ce69a9ca3f1bdc53f885036eed8a6867bb6107aa70c3.exe

Writes to the Master Boot Record (MBR) 1 TTPs 2 IoCs

Bootkits write to the MBR to gain persistence at a level below the operating system.

bootkit persistence

Bootkit

T1067

description	ioc	Process
File opened for modification	\??\PhysicalDrive0	afd2e8d0570b07bddbf2ce69a9ca3f1bdc53f885036eed8a6867bb6107aa70c3.exe
File opened for modification	\??\PhysicalDrive0	csrss.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 3456 set thread context of 3668	3456	afd2e8d0570b07bddbf2ce69a9ca3f1bdc53f885036eed8a6867bb6107aa70c3.exe	84
PID 3668 set thread context of 1860	3668	afd2e8d0570b07bddbf2ce69a9ca3f1bdc53f885036eed8a6867bb6107aa70c3.exe	85
PID 4184 set thread context of 2976	4184	csrss.exe	89
PID 2976 set thread context of 3880	2976	csrss.exe	90

Suspicious use of SetWindowsHookEx 6 IoCs

pid	Process
3456	afd2e8d0570b07bddbf2ce69a9ca3f1bdc53f885036eed8a6867bb6107aa70c3.exe
3668	afd2e8d0570b07bddbf2ce69a9ca3f1bdc53f885036eed8a6867bb6107aa70c3.exe
1860	afd2e8d0570b07bddbf2ce69a9ca3f1bdc53f885036eed8a6867bb6107aa70c3.exe
4184	csrss.exe
2976	csrss.exe
3880	csrss.exe

Suspicious use of WriteProcessMemory 38 IoCs

description	pid	Process	procid_target
PID 3456 wrote to memory of 3668	3456	afd2e8d0570b07bddbf2ce69a9ca3f1bdc53f885036eed8a6867bb6107aa70c3.exe	84
PID 3456 wrote to memory of 3668	3456	afd2e8d0570b07bddbf2ce69a9ca3f1bdc53f885036eed8a6867bb6107aa70c3.exe	84
PID 3456 wrote to memory of 3668	3456	afd2e8d0570b07bddbf2ce69a9ca3f1bdc53f885036eed8a6867bb6107aa70c3.exe	84
PID 3456 wrote to memory of 3668	3456	afd2e8d0570b07bddbf2ce69a9ca3f1bdc53f885036eed8a6867bb6107aa70c3.exe	84
PID 3456 wrote to memory of 3668	3456	afd2e8d0570b07bddbf2ce69a9ca3f1bdc53f885036eed8a6867bb6107aa70c3.exe	84
PID 3456 wrote to memory of 3668	3456	afd2e8d0570b07bddbf2ce69a9ca3f1bdc53f885036eed8a6867bb6107aa70c3.exe	84
PID 3456 wrote to memory of 3668	3456	afd2e8d0570b07bddbf2ce69a9ca3f1bdc53f885036eed8a6867bb6107aa70c3.exe	84
PID 3456 wrote to memory of 3668	3456	afd2e8d0570b07bddbf2ce69a9ca3f1bdc53f885036eed8a6867bb6107aa70c3.exe	84
PID 3668 wrote to memory of 1860	3668	afd2e8d0570b07bddbf2ce69a9ca3f1bdc53f885036eed8a6867bb6107aa70c3.exe	85
PID 3668 wrote to memory of 1860	3668	afd2e8d0570b07bddbf2ce69a9ca3f1bdc53f885036eed8a6867bb6107aa70c3.exe	85
PID 3668 wrote to memory of 1860	3668	afd2e8d0570b07bddbf2ce69a9ca3f1bdc53f885036eed8a6867bb6107aa70c3.exe	85
PID 3668 wrote to memory of 1860	3668	afd2e8d0570b07bddbf2ce69a9ca3f1bdc53f885036eed8a6867bb6107aa70c3.exe	85
PID 3668 wrote to memory of 1860	3668	afd2e8d0570b07bddbf2ce69a9ca3f1bdc53f885036eed8a6867bb6107aa70c3.exe	85
PID 3668 wrote to memory of 1860	3668	afd2e8d0570b07bddbf2ce69a9ca3f1bdc53f885036eed8a6867bb6107aa70c3.exe	85
PID 3668 wrote to memory of 1860	3668	afd2e8d0570b07bddbf2ce69a9ca3f1bdc53f885036eed8a6867bb6107aa70c3.exe	85
PID 3668 wrote to memory of 1860	3668	afd2e8d0570b07bddbf2ce69a9ca3f1bdc53f885036eed8a6867bb6107aa70c3.exe	85
PID 1860 wrote to memory of 4308	1860	afd2e8d0570b07bddbf2ce69a9ca3f1bdc53f885036eed8a6867bb6107aa70c3.exe	86
PID 1860 wrote to memory of 4308	1860	afd2e8d0570b07bddbf2ce69a9ca3f1bdc53f885036eed8a6867bb6107aa70c3.exe	86
PID 1860 wrote to memory of 4308	1860	afd2e8d0570b07bddbf2ce69a9ca3f1bdc53f885036eed8a6867bb6107aa70c3.exe	86
PID 1860 wrote to memory of 4184	1860	afd2e8d0570b07bddbf2ce69a9ca3f1bdc53f885036eed8a6867bb6107aa70c3.exe	88
PID 1860 wrote to memory of 4184	1860	afd2e8d0570b07bddbf2ce69a9ca3f1bdc53f885036eed8a6867bb6107aa70c3.exe	88
PID 1860 wrote to memory of 4184	1860	afd2e8d0570b07bddbf2ce69a9ca3f1bdc53f885036eed8a6867bb6107aa70c3.exe	88
PID 4184 wrote to memory of 2976	4184	csrss.exe	89
PID 4184 wrote to memory of 2976	4184	csrss.exe	89
PID 4184 wrote to memory of 2976	4184	csrss.exe	89
PID 4184 wrote to memory of 2976	4184	csrss.exe	89
PID 4184 wrote to memory of 2976	4184	csrss.exe	89
PID 4184 wrote to memory of 2976	4184	csrss.exe	89
PID 4184 wrote to memory of 2976	4184	csrss.exe	89
PID 4184 wrote to memory of 2976	4184	csrss.exe	89
PID 2976 wrote to memory of 3880	2976	csrss.exe	90
PID 2976 wrote to memory of 3880	2976	csrss.exe	90
PID 2976 wrote to memory of 3880	2976	csrss.exe	90
PID 2976 wrote to memory of 3880	2976	csrss.exe	90
PID 2976 wrote to memory of 3880	2976	csrss.exe	90
PID 2976 wrote to memory of 3880	2976	csrss.exe	90
PID 2976 wrote to memory of 3880	2976	csrss.exe	90
PID 2976 wrote to memory of 3880	2976	csrss.exe	90

C:\Users\Admin\AppData\Local\Temp\afd2e8d0570b07bddbf2ce69a9ca3f1bdc53f885036eed8a6867bb6107aa70c3.exe
"C:\Users\Admin\AppData\Local\Temp\afd2e8d0570b07bddbf2ce69a9ca3f1bdc53f885036eed8a6867bb6107aa70c3.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3456
- C:\Users\Admin\AppData\Local\Temp\afd2e8d0570b07bddbf2ce69a9ca3f1bdc53f885036eed8a6867bb6107aa70c3.exe
  "C:\Users\Admin\AppData\Local\Temp\afd2e8d0570b07bddbf2ce69a9ca3f1bdc53f885036eed8a6867bb6107aa70c3.exe"
  2⤵
  - Writes to the Master Boot Record (MBR)
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3668
- - C:\Users\Admin\AppData\Local\Temp\afd2e8d0570b07bddbf2ce69a9ca3f1bdc53f885036eed8a6867bb6107aa70c3.exe
    "C:\Users\Admin\AppData\Local\Temp\afd2e8d0570b07bddbf2ce69a9ca3f1bdc53f885036eed8a6867bb6107aa70c3.exe"
    3⤵
    - Modifies WinLogon for persistence
    - Adds policy Run key to start application
    - Adds Run key to start application
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:1860
  - - C:\Windows\SysWOW64\netsh.exe
      netsh advfirewall firewall add rule name="Nero" dir=in action=allow description="Multimedia suite" program="C:\Users\Admin\AppData\Roaming\Microsoft\csrss.exe" enable=yes
      4⤵
      Modifies Windows Firewall
      PID:4308
  - - C:\Users\Admin\AppData\Roaming\Microsoft\csrss.exe
      C:\Users\Admin\AppData\Local\Temp\afd2e8d0570b07bddbf2ce69a9ca3f1bdc53f885036eed8a6867bb6107aa70c3.exe
      4⤵
      Executes dropped EXE
      Suspicious use of SetThreadContext
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:4184
    - - C:\Users\Admin\AppData\Roaming\Microsoft\csrss.exe
        
        C:\Users\Admin\AppData\Local\Temp\afd2e8d0570b07bddbf2ce69a9ca3f1bdc53f885036eed8a6867bb6107aa70c3.exe
        5⤵
        Executes dropped EXE
        Writes to the Master Boot Record (MBR)
        Suspicious use of SetThreadContext
        Suspicious use of SetWindowsHookEx
        Suspicious use of WriteProcessMemory
        
        PID:2976
      - C:\Users\Admin\AppData\Roaming\Microsoft\csrss.exe
        
        C:\Users\Admin\AppData\Local\Temp\afd2e8d0570b07bddbf2ce69a9ca3f1bdc53f885036eed8a6867bb6107aa70c3.exe
        6⤵
        Executes dropped EXE
        Suspicious use of SetWindowsHookEx
        
        PID:3880

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Bootkit

T1067

Modify Existing Service

T1031

Registry Run Keys / Startup Folder

T1060

Winlogon Helper DLL

T1004

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\csrss.exe

Filesize
480KB

MD5
1db5f2c2b826078e1c06c88d87b37897

SHA1
e969f8927d8865dc4e63ee5606e262aa54d88dd2

SHA256
afd2e8d0570b07bddbf2ce69a9ca3f1bdc53f885036eed8a6867bb6107aa70c3

SHA512
cbffba4fd768e4395131746928b84d68bdc98c5bb67af436c6f2bdb4fe86cf4cdd3c689b912dfdb9494e0f0365b3a9b04e5538f3b789ae5939dec0aa23b97ad0

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\csrss.exe

Filesize
480KB

MD5
1db5f2c2b826078e1c06c88d87b37897

SHA1
e969f8927d8865dc4e63ee5606e262aa54d88dd2

SHA256
afd2e8d0570b07bddbf2ce69a9ca3f1bdc53f885036eed8a6867bb6107aa70c3

SHA512
cbffba4fd768e4395131746928b84d68bdc98c5bb67af436c6f2bdb4fe86cf4cdd3c689b912dfdb9494e0f0365b3a9b04e5538f3b789ae5939dec0aa23b97ad0

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\csrss.exe

Filesize
480KB

MD5
1db5f2c2b826078e1c06c88d87b37897

SHA1
e969f8927d8865dc4e63ee5606e262aa54d88dd2

SHA256
afd2e8d0570b07bddbf2ce69a9ca3f1bdc53f885036eed8a6867bb6107aa70c3

SHA512
cbffba4fd768e4395131746928b84d68bdc98c5bb67af436c6f2bdb4fe86cf4cdd3c689b912dfdb9494e0f0365b3a9b04e5538f3b789ae5939dec0aa23b97ad0

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\csrss.exe

Filesize
480KB

MD5
1db5f2c2b826078e1c06c88d87b37897

SHA1
e969f8927d8865dc4e63ee5606e262aa54d88dd2

SHA256
afd2e8d0570b07bddbf2ce69a9ca3f1bdc53f885036eed8a6867bb6107aa70c3

SHA512
cbffba4fd768e4395131746928b84d68bdc98c5bb67af436c6f2bdb4fe86cf4cdd3c689b912dfdb9494e0f0365b3a9b04e5538f3b789ae5939dec0aa23b97ad0

Download Submit
memory/1860-142-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/1860-155-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/1860-153-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/2976-168-0x0000000000400000-0x0000000000449000-memory.dmp

Filesize
292KB

Download
memory/2976-170-0x0000000000400000-0x0000000000449000-memory.dmp

Filesize
292KB

Download
memory/3456-132-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3668-140-0x0000000000400000-0x0000000000449000-memory.dmp

Filesize
292KB

Download
memory/3668-144-0x0000000000400000-0x0000000000449000-memory.dmp

Filesize
292KB

Download
memory/3668-136-0x0000000000400000-0x0000000000449000-memory.dmp

Filesize
292KB

Download
memory/3880-169-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/3880-171-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads